the executive director of the center for science in the public interest said, "overdoing caffeine alone actually pretty difficult to do. someone would have to make an effort to consume 40 or so 200-mg caffeine tablets." or... about this much 5-hour energy... in a single day. we recomme... not more than two per day. yeah, when we first came t th the product... you know, i made sure of one thing. if my family wasn't going to use it... if it wasn't good enough for my family if it wasn't safe for my family... i'm not gonna put it out there. i take it almost every day. and twice when i play tennis. this is our criteria that we have to be safe... if we're not willing to do it ourselves.. we'rnot asking anybody else to do it. we're nogonna sell it. so, that's our approach to safety... that is a higher standard you can get. i took my son fishing every year. we had a great spot, not easy to find, but worth it. but with copd making it hard to breathe, i thought those days ght be over. so my doctor prescribed symbicort. it helps significantly improve my lung function starting within five minutes.